package cn.tedu.ivos.application.service.impl;

import cn.tedu.ivos.application.mapper.ApplicationMapper;
import cn.tedu.ivos.application.pojo.dto.ApplicationQuery;
import cn.tedu.ivos.application.pojo.dto.ApplicationSaveParam;
import cn.tedu.ivos.application.pojo.entity.Application;
import cn.tedu.ivos.application.pojo.vo.ApplicationVO;
import cn.tedu.ivos.application.service.ApplicationService;
import cn.tedu.ivos.audit.mapper.AuditMapper;
import cn.tedu.ivos.audit.pojo.vo.AuditVO;
import cn.tedu.ivos.audit.service.AuditService;
import cn.tedu.ivos.base.enums.ApplicationStatusEnum;
import cn.tedu.ivos.user.mapper.UserMapper;
import cn.tedu.ivos.user.pojo.vo.UserVO;
import cn.tedu.ivos.vehicle.mapper.VehicleMapper;
import cn.tedu.ivos.vehicle.pojo.entity.Vehicle;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.StringJoiner;

@Transactional
@Slf4j
@Service
public class ApplicationServiceImpl implements ApplicationService{
    @Autowired
    ApplicationMapper applicationMapper;
    @Autowired
    AuditService auditService;
    @Autowired
    UserMapper userMapper;
    @Autowired
    AuditMapper auditMapper;
    @Autowired
    VehicleMapper vehicleMapper;

    @Override
    public void save(ApplicationSaveParam applicationSaveParam) {
        log.debug("保存申请单业务:applicationSaveParam={}",applicationSaveParam);
        Application application = new Application();
        BeanUtils.copyProperties(applicationSaveParam,application);
        //新增申请单,初始状态为"已发起"
        application.setStatus(ApplicationStatusEnum.PENDING.getCode());
        application.setCreateTime(new Date());

        //遇到的问题:新增申请单对应的审批单数据时,审批数据没有申请单的id
        //原因:id是一个比较特殊的属性,无法通过任何select条件获取
        //解决方案:给insert方法对应的SQL上加 useGeneratedKeys="true" keyProperty="id"
        //效果:JDBC会为当前的application对象自动生成自增主键并且把生成的主键赋值给当前application对象的id字段
        applicationMapper.insert(application);

        //还需要调用审批业务层,为当前申请单同步新增对应的审批数据
        auditService.insertAudit(application);//这步同步有问题
    }

    @Override
    public List<ApplicationVO> selectApplication(ApplicationQuery applicationQuery) {
        log.debug("查询申请单业务:applicationQuery={}",applicationQuery);
        List<ApplicationVO> list = applicationMapper.selectApplication(applicationQuery);
        //遍历每一个申请单,依次为每个遍历到的申请单添加审批人数据
        for(int i = 0; i < list.size() ; i++){
            ApplicationVO applicationVO = list.get(i);
            //处理当前的申请单VO,给它添加审批人数据
            assignAuditUserList(applicationVO);
        }
        return list;
    }

    @Override
    public void cancel(Long id) {
        log.debug("撤销申请业务:id={}",id);
        Application application = new Application();
        application.setId(id);
        //设置当前申请单的状态为撤销
        application.setStatus(ApplicationStatusEnum.CANCEL.getCode());
        application.setUpdateTime(new Date());
        applicationMapper.update(application);

        //还需要删除此申请单对应的所有审批单数据
        auditMapper.deleteAuditByApplicationId(id);
    }

    @Override
    public void distribute(Long applicationId, Long vehicleId) {
        log.debug("分配车辆业务:applicationId={},vehicleId={}",applicationId,vehicleId);
        Application application = new Application();
        application.setId(applicationId);//设置要更新哪个申请单
        application.setVehicleId(vehicleId);//设置给申请单分配哪辆车
        //更新申请单状态为"已分配车辆"
        application.setStatus(ApplicationStatusEnum.ALLOCATION.getCode());
        application.setUpdateTime(new Date());
        applicationMapper.update(application);

        //车辆需要修改为"占用"
        Vehicle vehicle = new Vehicle();
        vehicle.setId(vehicleId);//设置更新哪辆车
        vehicle.setStatus("2");//设置车辆状态为"占用"
        vehicleMapper.update(vehicle);//执行车辆表的更新操作,注意车辆mapper需要注入!
    }

    @Override
    public void back(Long applicationId, Long vehicleId) {
        log.debug("还车业务:applicationId={},vehicleId={}",applicationId,vehicleId);
        Application application = new Application();
        application.setId(applicationId);
        /* 方案1:车辆状态改为"空闲",申请单状态改为"工单结束",但申请单的车辆id仍旧保留 */
        //application.setVehicleId(vehicleId);//设置要归还哪辆车
        /* 方案2:车辆状态改为"空闲",申请单状态改为"工单结束",但申请单的车辆id要设置为null */
        application.setVehicleId(null);//设置要归还哪辆车
        //设置当前申请单的状态为"工单结束"
        application.setStatus(ApplicationStatusEnum.END.getCode());
        application.setUpdateTime(new Date());
        /* 方案1:可以使用之前的更新SQL*/
        //applicationMapper.update(application);
        /* 方案2:需要重写一个将车辆id置为null值的新SQL*/
        applicationMapper.back(application);

        //还车需要把车辆状态修改为"空闲"
        Vehicle vehicle = new Vehicle();
        vehicle.setId(vehicleId);
        vehicle.setStatus("1");
        vehicleMapper.update(vehicle);
    }

    /*
    * 本方法用于给当前传入的申请单VO的审批人数据赋值(auditUserIdList与auditUsernameList)
     */
    private void assignAuditUserList(ApplicationVO applicationVO) {
        //1.准备空集合,分别用来保存申请单对应的审批人姓名与id集合
        List<String> auditUsernameList = new ArrayList<>();
        List<Long> auditUserIdList = new ArrayList<>();
        //2.根据传入的申请单对象id查出对应的审批数据,注意:审批数据可能有多条
        List<AuditVO> auditVOList = auditService.selectAuditByApplicationId(applicationVO.getId());
        //3.依次遍历每一个审批单对象
        for(int i=0; i<auditVOList.size(); i++){
            AuditVO auditVO = auditVOList.get(i);
            //4.取出审批VO中的审批人id,装入上方的空集合中
            Long id = auditVO.getAuditUserId();
            auditUserIdList.add(id);
            //5.根据刚刚取出的审批人id,查出此人姓名,装入上方的空集合中
            UserVO userVO = userMapper.selectById(id);
            auditUsernameList.add(userVO.getUsername());//这个值看下赋值有问题
        }
        //6.准备一个拼接工具,帮我们将所有审批人姓名连成一个字符串
        StringJoiner stringJoiner = new StringJoiner(",");
        for(String username : auditUsernameList){
            stringJoiner.add(username);
        }
        //将拼接好的审批人姓名字符串赋值给申请单VO的AuditUsernameList属性
        applicationVO.setAuditUsernameList(stringJoiner.toString());
        //将准备好的审批人id集合赋值给申请单VO的AuditUserIdList属性
        applicationVO.setAuditUserIdList(auditUserIdList);
    }
}







